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.50 caliber airgun

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  • GrapeApeGrapeApe Posts: 581 Senior Member
    Looking forward to your results
    "For longer range, use a bigger case. For bigger game, use a bigger bullet." - Dan Johnson
  • BigslugBigslug Posts: 9,858 Senior Member
    Kinda thinking along the same lines as Japhy and Freezer. . .

    Seems like there's a happy medium to be found in terms of bore diameter and efficiently expanding your air into it, projectile mass, the speed it can be driven to.

    I'm imagining that stuff in the .358 / .375 / .40 cal band would offer a pretty good balance of B.C., and S.D. for what looks to be the possibility of magnum handgun velocities with maybe medium- to heavy-for-caliber rifle bullets.  Not much that a 200-250 grain .358 wouldn't handle.

    Hmmmmmmm. . .
    WWJMBD?

    "Nothing is safe from stupid." - Zee
  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    My ultimate goal was to beat out the current big bore manufactured air guns in the same caliber. That goal was anything over 1000fps and I made up a figure of 1150, thinking it was wishful thinking. Now that that's behind me I'm going to try to take a deer with it just to say that I did, plus the meat in the freezer will be an added bonus. I will eventually try smaller caliber barrels though. I'm curious to see what velocity I can achieve with lighter grain bullets.
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • Wambli SkaWambli Ska Posts: 5,386 Senior Member
    Can a multi caliber swap barrel rifle be achieved?

    It’s a °IIIII° thing 😎

  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    Yes, I designed it for easy swapping of barrels. It doesn't have a true bolt or bolt face, just a probe that pushes the lead bullets into the chamber and seals it.
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • Wambli SkaWambli Ska Posts: 5,386 Senior Member
    Yes, I designed it for easy swapping of barrels. It doesn't have a true bolt or bolt face, just a probe that pushes the lead bullets into the chamber and seals it.
    Ok so that is just COOL!!!

    It’s a °IIIII° thing 😎

  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    Well I decided to screw around so I pulled a 325 grain bullet from a 500 s&w magnum and paper patched it. It ran great through the rifle.
    I absolutely love this thing lol.
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • JaphyJaphy Posts: 571 Senior Member
    about the same velocity as a .500 s&w.
    begs the question why do we have S&W 500s when we have airguns that do the same thing?
    cheaper, better, no backgound check, and ship to your door!
    that thing is just wicked cool!
  • FreezerFreezer Posts: 2,752 Senior Member
    Ah, you learn well grasshopper!

    That is getting too cool. That bullet should extend your effective range and will function well at those velocities.
    I like Elmer Keith; I married his daughter :wink:
  • SpkSpk Posts: 4,832 Senior Member
    edited March 23 #71
    I bet that has a bit of kick to it.

    What's the MPG like (shots per bottle). If you can get at least 3 shots at full power, I would consider marketing that beast to the hunting crowd (after you let Zee play with it for a while).

    If you have to get a slightly bigger bottle, it would still be worth it. I would imagine there's a lot of hunters out there looking to check off "Big Game" with an Air Rifle from their Bucket List.
    B)

    Never argue with stupid people, they will drag you down to their level and then beat you with experience -- Mark Twain
    How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain

  • Wambli SkaWambli Ska Posts: 5,386 Senior Member
    edited March 24 #72
    Japhy said:
    about the same velocity as a .500 s&w.
    begs the question why do we have S&W 500s when we have airguns that do the same thing?
    cheaper, better, no backgound check, and ship to your door!
    that thing is just wicked cool!
    Because it's tough to cart an air rifle of this size and weight if you're fly fishing in Alaska  :D

    It’s a °IIIII° thing 😎

  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    Spk said:
    I bet that has a bit of kick to it.

    What's the MPG like (shots per bottle). If you can get at least 3 shots at full power, I would consider marketing that beast to the hunting crowd (after you let Zee play with it for a while).

    If you have to get a slightly bigger bottle, it would still be worth it. I would imagine there's a lot of hunters out there looking to check off "Big Game" with an Air Rifle from their Bucket List.
    B)

    I'm getting 6 full powered shots at the moment. I was having a problem with my regulator and decided that a cheap Amazon one wasn't exactly reliable so I sunk the money into a good name brand one and all is well now.
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • JaphyJaphy Posts: 571 Senior Member
    Japhy said:
    about the same velocity as a .500 s&w.
    begs the question why do we have S&W 500s when we have airguns that do the same thing?
    cheaper, better, no backgound check, and ship to your door!
    that thing is just wicked cool!
    Because it's tough to cart an air rifle of this size and weight if you're fly fishing in Alaska  :D

    but when I went fly fishing in AK I didnt see one bear.  On the other hand when I hiked a loop in WA they were everywhere and just ignored me.  I had been primitive camping a few days so maybe they were all downwind?
  • Wambli SkaWambli Ska Posts: 5,386 Senior Member
    Japhy said:
    Japhy said:
    about the same velocity as a .500 s&w.
    begs the question why do we have S&W 500s when we have airguns that do the same thing?
    cheaper, better, no backgound check, and ship to your door!
    that thing is just wicked cool!
    Because it's tough to cart an air rifle of this size and weight if you're fly fishing in Alaska  :D

    but when I went fly fishing in AK I didnt see one bear.  On the other hand when I hiked a loop in WA they were everywhere and just ignored me.  I had been primitive camping a few days so maybe they were all downwind?
    A little different when you live there.  I’ve sold two guns to Alaska residents.  A Grizzly .44 Mag 1911 style semi-auto and my 4” barreled S&W 500.  Had a chance to speak to both individuals and both said they had waaaaaaaay to many encounters with bear and moose, one of them while letting the dog out to poop…

    It’s a °IIIII° thing 😎

  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    Nothing will give you a better perspective of the capabilities of a grizzly bear until you've seen the video of one breaking the back of a moose just by swatting it. Those things are a super predator. 
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • Wambli SkaWambli Ska Posts: 5,386 Senior Member
    Nothing will give you a better perspective of the capabilities of a grizzly bear until you've seen the video of one breaking the back of a moose just by swatting it. Those things are a super predator. 
    The one guy phrased it as “when one surprises you, no gun feels adequate.”

    It’s a °IIIII° thing 😎

  • SpkSpk Posts: 4,832 Senior Member
    Spk said:
    I bet that has a bit of kick to it.

    What's the MPG like (shots per bottle). If you can get at least 3 shots at full power, I would consider marketing that beast to the hunting crowd (after you let Zee play with it for a while).

    If you have to get a slightly bigger bottle, it would still be worth it. I would imagine there's a lot of hunters out there looking to check off "Big Game" with an Air Rifle from their Bucket List.
    B)

    I'm getting 6 full powered shots at the moment. I was having a problem with my regulator and decided that a cheap Amazon one wasn't exactly reliable so I sunk the money into a good name brand one and all is well now.
    So what's the final configuration gonna look like? How much will the final version weigh? Are you sticking with 6 full power shots? That'll certainly be good enough for hunting purposes. Are you staying with an 8 cu. inch plenum? What's the carbon fiber tank size? Most importantly, do you plan to build more than one and how much do you guesstimate the production model will cost?

    At least let Zee roll a few piggies 🐷 with the prototype so he can post up some bacon porn! It'll be good for marketing 👌
    Never argue with stupid people, they will drag you down to their level and then beat you with experience -- Mark Twain
    How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain

  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    I'm definitely planning on keeping the shot count, plenum volume and everything else the same as it is, except for putting on a carbon fiber bottle which is 29 cubic inches btw. With the carbon fiber bottle it'll weight right at 7 lbs, with the scope attached, rings, mount, etc... I actually have a different design in mind and a valve that should not only work in theory (built it in my brain and it functions), but it should easily surpass the abilities of the valve that I created for this rifle and it'll be easier to produce. I'm going to be starting on another prototype here shortly that will fit into a Remington 700 stock, except for the forearm area where the valve and plenum will go and it's going to be using my new valve design and it'll be a simple and light bolt action for ease of manufacturing. I'm hoping to be able to sell these for somewhere around $800 or so which is fair in the bigbore airgun market at the moment.
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • Diver43Diver43 Posts: 12,747 Senior Member
    I'm definitely planning on keeping the shot count, plenum volume and everything else the same as it is, except for putting on a carbon fiber bottle which is 29 cubic inches btw. With the carbon fiber bottle it'll weight right at 7 lbs, with the scope attached, rings, mount, etc... I actually have a different design in mind and a valve that should not only work in theory (built it in my brain and it functions), but it should easily surpass the abilities of the valve that I created for this rifle and it'll be easier to produce. I'm going to be starting on another prototype here shortly that will fit into a Remington 700 stock, except for the forearm area where the valve and plenum will go and it's going to be using my new valve design and it'll be a simple and light bolt action for ease of manufacturing. I'm hoping to be able to sell these for somewhere around $800 or so which is fair in the bigbore airgun market at the moment.
    I hope you make and sell a bunch of them!!!

    I looked at the high power bigger bore airguns when the local Iguanas got really big and would decimate any fruit, vegetable, or even flower you tried to grow, but they were just too expensive.   I relooked at them after moving and had an armadillo problem.
    Cost has come down but between a neighbors trap and the guy across the street having woods behind him they are not tearing up my yard anymore.
    I still WANT one though.  Let me know when your ready to go to market.
    Logistics cannot win a war, but its absence or inadequacy can cause defeat. FM100-5
  • Wambli SkaWambli Ska Posts: 5,386 Senior Member
    HEY!!!  I’d already called dibs for Serial #2!!!!!  👍👍

    It’s a °IIIII° thing 😎

  • Diver43Diver43 Posts: 12,747 Senior Member
    HEY!!!  I’d already called dibs for Serial #2!!!!!  👍👍
    That leaves #1 for me 😁
    Logistics cannot win a war, but its absence or inadequacy can cause defeat. FM100-5
  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    I started on my new air valve today. I wish I could detail the design for it because I'm really really proud of this one. It's never been done before and it will be able to open up at mach speeds with little to no effort. The valve in my current build is good and works good, but this one should be something else altogether and I'm dying to know what kind of performance it's going to allow, along with efficiency. I won't be putting it on my current rifle but the more simplistic bolt action design that's going to be the prototype for the models that I plan to sell.
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • FreezerFreezer Posts: 2,752 Senior Member
    https://nielsenspecialtyammo.com/store/

    Another rabbit hole to explore! 

    There is a wide selection of bullet calibers to choose from.

    Do you intend to experiment with other calibers?

    Could it be fitted for interchangeable barrels for a quick caliber change? Will the regulating valve be adjustable?

    Neilson has a limited 30 cal selection, but their 45 cal selection is interesting. 45 cal will also open a whole new world of possibilities in bullet design, and you can get ML barrels premade.

    Are ML barrels cheaper than standard rifle barrels? 

    What's your thoughts on barrel twist in a 45 cal?

    I kind of like the AR style of butt stock as it is light, adjustable and almost everyone has AR parts in their stash.


    I like Elmer Keith; I married his daughter :wink:
  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    I've bought quite a few different caliber slugs from Nielson. They make great ammo. I've made the first rifle able to take interchangeable barrels but have yet to put one on, because blanks aren't really cheap. I'm using what is essentially a black powder cartridge barrel blank that's a 1:28 twist. What I am finding with airguns is that it's best to use the bare minimum twist for bullet stabilization or else a faster twist will rob the gun of a bit of velocity. It's a phenomenon that's much less apparent with powder burners. It's also necessary to use the longest barrel possible to make use of the available air volume as well. I've yet to experiment with any 45 caliber barrels.
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • JaphyJaphy Posts: 571 Senior Member
    I started on my new air valve today. I wish I could detail the design for it because I'm really really proud of this one. It's never been done before and it will be able to open up at mach speeds with little to no effort. The valve in my current build is good and works good, but this one should be something else altogether and I'm dying to know what kind of performance it's going to allow, along with efficiency. I won't be putting it on my current rifle but the more simplistic bolt action design that's going to be the prototype for the models that I plan to sell.
    Just a suggestion your new valve might be patentable If it operates unlike existing valves. It may have other uses than air guns. Sounds like it’s worth investigating. 
  • JustsomedudeJustsomedude Posts: 1,463 Senior Member
    I don't know of any uses for it other than what I intend but it should be able to be patented, or at least I hope so. Honestly the last valve or the one in the current rifle is proprietary itself but I want to see how this pans out before hiring a patent attorney. 
    We've been conditioned to believe that obedience is virtuous and voting is freedom- 
  • Jeeper44magJeeper44mag Posts: 123 Member
    1500+ fps with a 325 grain .500 caliber bullet?   Sign me up!   That's absolutely awesome! 

    Luis
  • SpkSpk Posts: 4,832 Senior Member
    A 325 grain bullet at 1587 fps is a brisk kicker but 1818 ft-lbs and a 516 PF. It's very impressive AND it's an airgun! Certainly, a big game candidate and something gun enthusiasts would want.

    I know I want one. Piggies beware 😍
    Never argue with stupid people, they will drag you down to their level and then beat you with experience -- Mark Twain
    How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain

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